The rules in this section apply to existing hoisting and lowering mechanisms equipped with cars that:

(1) Move within guides in a substantially vertical direction;

(2) Have a maximum net inside area of 28 ft²;

(3) Have a maximum total internal height of 48 in. and a maximum total internal width of 36.5 in.; and

(4) Utilize a series of rollers as a platform to exclusively carry caskets;

(5) Are provided with a hoistway enclosure, and related construction that are in substantial compliance with the building code.